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Wire size for 100 amp service
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dhfarmboy1066
Posted 3/15/2013 20:20 (#2967911)
Subject: Wire size for 100 amp service



North Carolina
I need to pull a line to a tractor shed about 150 feet . I need to put in a direct burial cable . Going to a 100 Amp sub panel box . What size cable do I need to put in . Only going to pull Lights small hand tools and maybe a small welder . Thanks Doug
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hillfarmer
Posted 3/15/2013 20:22 (#2967918 - in reply to #2967911)
Subject: RE: Wire size for 100 amp service



hundred foot number 2 al

150 would be more like 0
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TLSJR
Posted 3/15/2013 20:23 (#2967925 - in reply to #2967911)
Subject: Re: Wire size for 100 amp service


central Minnesota

i work for a power co and we would use 1/0 2 1/0 aluminum in a flexible conduit. It is fairly inexpensive.
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FallcreekFarmer
Posted 3/15/2013 20:25 (#2967932 - in reply to #2967911)
Subject: Re: Wire size for 100 amp service



Payson, Il
How many volts, copper or aluminum, is it single phase?
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baler brian
Posted 3/15/2013 20:44 (#2967991 - in reply to #2967911)
Subject: RE: Wire size for 100 amp service



Minimum size for dwelling (house) is 2 AL to serve 100 amps. Any other building 2AL will need to be fused at 90 amps.

Check Voltage drop tables to see if you need to increase the size of the wire to compensate for Voltage drop
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JohnDeere56
Posted 3/15/2013 21:27 (#2968099 - in reply to #2967911)
Subject: Re: Wire size for 100 amp service


At that distance I would use 2/0 2/0 2/0. That's. UD triplex, Or go with 2/0 2/0 2/0 #4 that UD quad , That quad will carry a. Saftey ground. Required by national electric code.
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pupdaddy12003
Posted 3/15/2013 22:10 (#2968232 - in reply to #2968099)
Subject: Re: Wire size for 100 amp service



NW Central Ohio
...you only want to do it once. Go with 2/0, 2/0, 2/0....and you'll never regret it. Aluminum wire loses a lot of conductivity relatively quickly....especially if it gets water in it. Put it in conduit...
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KevinBfromIllinois
Posted 3/16/2013 11:16 (#2969032 - in reply to #2967911)
Subject: RE: Wire size for 100 amp service


RINGWOOD, IL
My experence in this is I would go with direct burial cable minimum of 3/0 AL reason for a AL as opposed to copper is if if starts to fault copper will keep working and also send power into the ground without you knowing before it faults where AL will just burn through and you will know it now, I also would suggest to put it in pipe that way if ever built or paved over all you need to do if it goes bad is pull it out and back in and with 3/0 AL you have the ability to go up to 200 amp service down the road just my thoughts good luck.
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